The Holosun SCRS-GR-2 is an ultra-compact 20mm tube sight designed specifically for long gun applications. This advanced solar charging rifle sight incorporates Holosun's innovative SCS technology and features multi-directional light sensors along with an advanced auto mode for automatic reticle intensity settings. It also includes a manual mode for precise control of dot intensity. Built from durable 7075 aluminum the SCRS-GR-2 comes with a lower 1/3 co-witness 1.63 mount and utilizes the proven 509T footprint for compatibility with third-party offset RDS mounts.The sight is equipped with a 2 MOA green dot reticle and offers 12 reticle intensity settings including four that are compatible with night vision devices. With an impressive battery life of up to 50 000 hours it features an internal rechargeable battery for long-lasting performance. The optic is multi-coated for enhanced clarity and is IP67 waterproof for reliable use in challenging environments. The SCRS-GR-2 has unlimited eye relief and provides adjustable windage and elevation capabilities. Compact and lightweight at just 2.45 oz with a length of 1.70 inches this 20mm tube sight is engineered for precision and versatility.